The Stealthy Sac Spiders of South America

While many spiders rely on webs to catch prey, the Umuara genus belongs to a unique family that actively hunts on the ground. These elusive creatures were only scientifically recognized in the late nineties.

These spiders are part of the Anyphaenidae family, which is famous for the specialized way they breathe through a unique tracheal system. Unlike their silk-spinning cousins, they roam freely to track down insects under forest debris. They represent a fascinating example of how little we still know about the biodiversity hidden in South American jungles. Their discovery shows that brand-new groups of animals are still being identified by researchers today.